Difference between Octane render and Eevee render?
Well, yes and no. Octane is not for blender only, it's more of an engine in many 3d software. https://render.otoy.com/forum/viewtopic.php?f=7&amp;t=72241#p366488, Octane uses the computer GPU to render, and it is like Cycles but a real-time raytracing, which means its acts like evee but produces renders like cycles. Evee is just a real time render engine 
which doesn't care about light that much.